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Patch

A precompiled .hex can be found in LUFA-100807-patched/Projects/. If you want to use that, you can skip this writeup.

Download and patch

This section is for the die-hard folks that want to start from vanilla downloads. If you're happy using the sources in LUFA-100807-patched, you can jump to the Build section.

Download the sources

  • LUFA-100807, unzip and remove the contents of the Projects directory.
  • dualMocoLUFA, unzip and move the files to the LUFA Projects directory.

Patch to specify the IDs, microcontroller and reverse the pin logic.

  • The main LUFA makefile

    • change it so that it only builds the Projects directory

  • Projects\makefile (specify target)

    • line 65: MCU = atmega16u2
    • line 72: ARDUINO_MODEL_PID = 0x0043

  • Projects\Descriptors.c (fix compile error and specify identifiers)

    • search and replace PROGMEM with PROGMEM const
    • line 80: .VendorID = 0x2341
    • line 82: .ProductID = ARDUINO_MODEL_PID

  • Projects\Descriptors.c (change the USB device name)

    • line 452: .Header = {.Size = USB_STRING_LEN(14), .Type = DTYPE_String}
    • line 454: .UnicodeString = L"Pitch Detector"

  • Projects\Descriptors.h (specify ID)

    • line 57: ARDUINO_UNO_PID 0x0043

  • Projects\dualMoco.c (reverse the logic)

    • line 48: mocoMode = 0
    • line 340: mocoMode = 1

Build

From Linux (e.g. Window Subsystem for Linux)

sudo apt-get install binutils make gcc-avr avr-libc uisp avrdude flex byacc bison
cd Projects
make clean
make -s

Move the resulting Projects/dualMoco.hex over to your regular environment.1

Footnotes

  1. For your piece of mind, the original firmware can be found in the Arduino directory as hardware\arduino\avr\firmwares\atmegaxxu2\arduino-usbserial\Arduino-usbserial-atmega16u2-Uno-Rev3.hex. ↩